APA Style
Backer, C, A., Brink, R, C, B, V, D. (1968).
Flora of Java (Spermatophytes Only) Volume 2 .
Belanda:
Wolter Kluwer.
MLA Style
Backer, C., A.., Brink, R., C., Bakhuizaen, Van, Den.
"Flora of Java (Spermatophytes Only) Volume 2".
Belanda:
Wolter Kluwer,
1968.
REFERENCE.